The RMCO6.6-10Sf from Response Microwave Inc is a Directional Coupler with Frequency 6 to 10 GHz, Coupling 6 +/- 0.5 dB, Coupling Variation 0.5 dB, Directivity 15 dB, Insertion Loss 2 dB. Tags: Module with Connectors. More details for RMCO6.6-10Sf can be seen below.